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A 5/8-inch diameter Teflon disposable bailer was used to collect the water sample within the <br /> hydropunch casing. <br /> Groundwater samples were collected after well purging to assure fresh formation water was <br /> being sampled in wells MW-1, MW-2 and MW-3. The purging process was monitored by <br /> measuring groundwater conductivity, temperature, and PH using Hydac digital tester. <br /> Following equilibration of the physical groundwater characteristics, and 90 percent of the <br /> predeveloped groundwater elevation had been obtained, a sample was collected by a <br /> ] disposable bailer at the air-water interface. <br /> The water samples were placed in three 40 milliliter glass containers (VOA's) and 1-liter <br /> glass jars. The samples were labeled and placed in refrigerator storage for transport under <br /> chain-of-custody to the above mentioned laboratory. <br /> 4.6 DECONTAMINATION PROCEDURES AND CONTAINMENT OF MATERIALS <br /> Prior to advancement of each soil boring, the augers were decontaminated utilizing <br /> pressurized hot water. Between each sample interval,the sampler and brass or stainless steel <br /> sleeves were decontaminated with an Alconox solution scrub,followed by tap water and final <br /> distilled water rinses. <br /> Drill cuttings, and waste water were contained in labeled, DOT-approved 55-gallon drums <br /> stored onsite for disposal upon receipt of the laboratory test results. <br /> J <br /> r <br /> -a <br /> JN 10007-097-01 <br /> 4-3 <br />